Dental instrument.



R. v. BRANDT.

DENTAL INSTRUMENT.

APPLlCATlON FILED JAN. I4, 1916.

1,229,024. Patented June 5, 1917.

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AYMOND v. BRANDT, or" GERMANIA, IOWA.

DENTAL INSTRUMENT,

Specification of Letters Patent.

Patented June 5, 1917.

Application filed January 14, 1916. Serial No. 72,098.

To all whom it may concern:

Be it known that I,RAYMOND VEBRANDT, a citizen of the United States,residing at Germania, in the county of Kossuth and State of Iowa, haveinvented certain new and useful Improvements in Dental Instruments; andI do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to new and useful improvements in dentalinstruments and the primary object of the invention is to provideadental instrument which is constructed so that the bit of theinstrument may be adjusted at various angles, as may be found necessarywhen working upon a persons teeth.

Another object of this invention isto provide a dental tool asspecified, which has a reduced shank projecting outwardly from one end.of the same,upon which shank is formed a concave clamping member, asleeve for adjustable and detachable connection to the handle andmounted over said reduced end, and to provide a bit which has a sphereformed upon oneend of thesame, for seating in one end of said sleeve,said sphere having a ,portionof, its surface roughened and being held invarious adjusted positions by the clamping of the concave clampingmember against the roughened portion thereof.

With the foregoing and other objects in view this invention consists ofsuch novel features of construction, combination and arrangement ofpartsas will be hereinafter more fully described, illustrated in theaccompanying drawings and claimed.

In describing the'invention in detail reference will be had to theaccompanying V drawings wherein like characters designate like andcorresponding parts throughout the several views, and in which Figure 1is a side elevation of the improved dental tool.

Fig. 2 is a longitudinal section through a portion of the dental tool.

Fig. 3 is a side elevation of a modified form of the adjustable sleeveshowing a part thereof in section,

Fig. 4 is a side elevation of a modified form of disk used in connectionwith the improved dental instrument,and I Flg. 5 1s a detail viewpartially in section of a modified form of the adjustable sleeve.

Referring more particularly to the drawings, 1 designates the handle ofthe instrument, which handle may be constructed of; any suitablematerial and shaped round, hexagonal or any other desired shape, The

handle 1 has a reduced portion 2 formed, upon one end of the same whichprojects outwardly therefrom, and has its outermost portion as indicatedat 3, substantially coneshaped, terminating in a head 41, the outersurface of which is cut concaved, as at 5. The handle 1 isprovided withan annular recess 6 extending inwardly from the end, outwardly of whichthe reduced portion 2 extends, and the inner wall of the recess 6.

extending therethrough. The opening 12 may be positioned at any desiredangle with respect to the central axis ofthe handle 1 as may be deemednecessary in the construction of this device.

The bit which is referred to by the numeral 14, includes the working end15 of the bit which may be of any numerous type of dental instrumentnecessary in dentistry, such as sealers, cutting instrument, oluggers,explorers, mouth mirrors or the li e. The bit 15 has a sphere 16 formedupon its inner end which is adapted for seating in the substantiallyspherical head 11. The opening 12 is larger than the portion of the bitwhich extends therethrough, so as to permit of a limited movement of thebit with respect to the casing 10. When it is desired to adjust theposition of the bit, the sleeve 8 is rotated in the direction for movingit outwardly from the end of the handle, and the bit is placed at thedesired angle, after which the sleeve is rotated in a reverse direction,which will cause it to move inwardly toward the handle 1, and over theportion 3 of the reduced end 2 of the handle, until the head 4 engagesthe sphere 16, which will force the sphere into engagement with thewalls of the head 11 and prevents accidental rotation of the sphere 16and consequently the bit 15.

By forming the recess 6, within. the end Of 7 the handle 1, a flangeindicated at 17 is formed which will extend over the inner end of theportion 9 of the sleeve 8; The concave surface 5 of the head 4, and theportion of the sphere 16 which is engaged by the I concave head may beroughened as shown at I alinement with the central axis of the sleeve.

The openings formed in the spherical head on the end of the sleeve maybe made at any angle desired.

In Fig. 4, a different type of bit is illustrated, from that which isshown in Fig. 2 0f the drawings, and it is to be understood that any ofthe previously mentioned instruments may be provided with a sphericalhead asindicated at 20 for usein connection with the improved instrumenthandle.

In Fig. 5 of the drawings,-a modified form of the sleeve is shown, whichform includes a sleeve 30 having a detachable nipple 31 connected to:its outer end, upon which the spherical casing 32 is formed. The nipple31 is internally screw threaded, as is shown Copies of this patent maybe obtained for five cents each by addressing th com missi oner ofPatents,

at 33, for coaction with the external screw threads 34 formed on thereduced outer end of the conical portion 35 of the sleeve 30. Adetachable nipple 31 is provided for permitting of the changing of thebits without necessitating the changing of the sleeve.

Inredu'cing the invention to practice certain minor features ofconstruction, combination and arrangement of parts may necessitatealterations to which the patentee is entitled, provided such alterationsare comprehended within the scope of what is claimed.

What is claimed is In a dental instrument structure, the combination, ofa handle having a reduced portion projecting longitudinally from one endof the same, an enlarged head formed upon the terminal of said reducedportion and having a concaved outer surface, said handle provided withan annular recess extending inwardly from one end and surroundin theinner end of said reduced portion, a s eeve adjustably connected to andinclosing said reduced portion, the inner end of said sleeve extendinginto said annular recess, a bit, a spherical head formed upon said bit'and seated in said sleeve, said enlarged head adapted for clampingengagement with said spherical head for holding said bit in adjustable'positions, said spherical head having a portion of its surface roughenedfor preventing accidental movement of said bit with respect to saidreduced portion.

In testimony whereof I aiiix mysignature in presence of two witnesses.

Witnesses: r

ROLAND A; MILLER, ,WALTER W. RosnNAU.

7 Washington, D. C.

RAYMOND V. BRANDT.

